我正在使用系统默认相机拍照并将图像保存到SD卡。Android默认相机崩溃
该应用在Nexus 5个优良与Android 6.0。 但在三星Galaxy S4搭载Android 5.0.1应用程序崩溃,当我按“保存”这个问题:
了java.lang.RuntimeException:无法启动活动 ComponentInfo {com.jublikon.example/com.jublikon.example.ReviewMaschine.ReviewActivity}: 显示java.lang.NullPointerException:尝试上的空对象引用
调用虚拟方法 'INT java.lang.Integer.intValue()' 为什么在相机活动尝试启动另一个活动? 它应该只保存图像并完成()本身。
我的捕捉图像的方法看起来像这样:
文件:
private void captureImage() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // start the image capture Intent startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE); }
的fileURI所用代码生成///storage/emulated/0/Pictures/ImageDokumentation/IMG_20151214_214131.jpg
我注意到,在应用上,三星Galaxy S4保存图像本地,而不是SD卡上。也许这是我犯的错误? 我意识到有时图片会被保存,有时候不会。应用程序停止在每种情况下。
应用崩溃,而不会在onActivityResult。
我真的不明白我做错了什么。该应用程序可以在物理Nexus设备上正常工作而不会出现任何问
编辑:因为它似乎是一个更复杂的问题,这里的片段的缩短代码:
public class FragmentReview extends Fragment {
// some initialization (...)
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
public static final int MEDIA_TYPE_IMAGE = 1;
private static final String IMAGE_DIRECTORY_NAME = "ImageDokumentation";
private Uri fileUri; // file url to store image/video
// Permission Strings
private static final String PERMISSION_HARDWARE_CAMERA = "android.permission.CAMERA";
private static final String PERMISSION_WRITE_EXTERNAL_STORAGE = "android.permission.WRITE_EXTERNAL_STORAGE";
private static final String IMAGE_URI_BUNDLE = "fileUri";
public FragmentReview() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Adding some data
setRetainInstance(true);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelable(IMAGE_URI_BUNDLE, fileUri);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
List<ReviewItem> currentData = mAdapter.getCurrentData();
DatabaseHandler db = new DatabaseHandler(getActivity());
Maschine updateMaschine = new Maschine();
updateMaschine = db.getMaschineForKeyMaschineAndAnlage(getIdForSelectedAnlage(), getIdForSelectedMaschine());
switch (item.getItemId()) {
case R.id.action_save:
//saving some data
return true;
case R.id.action_photo:
if (isDeviceSupportCamera()) {
boolean checkcamera = hasPermission(PERMISSION_HARDWARE_CAMERA);
boolean checkstorage = hasPermission(PERMISSION_WRITE_EXTERNAL_STORAGE);
if(hasPermission(PERMISSION_HARDWARE_CAMERA) == true && hasPermission(PERMISSION_WRITE_EXTERNAL_STORAGE)){
try {
captureImage();
} catch (Exception e) {
new MaterialDialog.Builder(getActivity())
.title("Berechtigungen nicht aktiviert")
.content("Bitte lassen Sie in den Einstellungen die notwendigen Berechtigungen zu")
.positiveText("OK")
.show();
}
} else {
new MaterialDialog.Builder(getActivity())
.title("Berechtigungen nicht aktiviert")
.content("Bitte lassen Sie in den Einstellungen die notwendigen Berechtigungen zu")
.positiveText("OK")
.show();
}
} else {
new MaterialDialog.Builder(getActivity())
.title("Fehler")
.content("Kamera konnte nicht geöffnet werden")
.positiveText("OK")
.show();
}
return false;
case R.id.action_gallery:
// starting gallery activity
return true;
default:
break;
}
return false;
}
private boolean isDeviceSupportCamera() {
if (getActivity().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
// this device has a camera
return true;
} else {
// no camera on this device
return false;
}
}
private void captureImage() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
// start the image capture Intent
startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
public Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
private static File getOutputMediaFile(int type) {
File mediaStorageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + File.separator + IMAGE_DIRECTORY_NAME);
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
mediaStorageDir.mkdirs();
if (!mediaStorageDir.mkdirs()) {
Log.d(IMAGE_DIRECTORY_NAME, "Fehler beim Erstellen der Datei: "
+ IMAGE_DIRECTORY_NAME + " directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else {
return null;
}
return mediaFile;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
try{
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
DatabaseHandler db = new DatabaseHandler(getActivity());
db.addImage(getIdForSelectedAnlage(), getIdForSelectedMaschine(), fileUri.toString());
Toast.makeText(getActivity(),
"Bild wurde gespeichert" + fileUri.toString(), Toast.LENGTH_SHORT)
.show();
//previewCapturedImage();
} else if (resultCode == Activity.RESULT_CANCELED) {
// user cancelled Image capture
/* Toast.makeText(getActivity(),
"User cancelled image capture", Toast.LENGTH_SHORT)
.show(); */
} else {
// failed to capture image
/* Toast.makeText(getActivity(),
"Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show(); */
}
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getActivity(),
"Datei konnte nicht in Datenbank gespeichert werden", Toast.LENGTH_SHORT)
.show();
}
}
public boolean hasPermission(String permission)
{
try {
PackageInfo info = getActivity().getPackageManager().getPackageInfo(getActivity().getPackageName(), PackageManager.GET_PERMISSIONS);
if (info.requestedPermissions != null) {
for (String p : info.requestedPermissions) {
if (p.equals(permission)) {
return true;
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
}
我已将您的建议添加到我的代码中。但它仍然给出同样的问题。也许我做错了,出于某种原因......为了展示我已经完成的工作,我已经将frament的代码添加到了我的上一篇文章中 – jublikon
您是否添加了将imageUri恢复到onCreate的代码?看看我的例子onCreate()和你的onCreate,它是不同的@jublikon – northerngirl
Rootcause:多次重新创建活动,你的imageUri为null。你需要保存在Bundle中。 您也可以在AndroidManifest.xml文件中为您的活动添加可选属性:android:configChanges =“orientation | screenSize” – northerngirl